[vulkan] Simplify swapchain present queue

This CL makes some changes to simplify swpcahin present logic.

- `unsquashable` flag ensures that each present is unique. We don't
need to wait for one present to finish to start the next.
- We don't need to explicityle set timestamps to the current time as
we are targeting the next closes frame. That can be expressed by 0.
- Rename fences to fence_signalers to clarify the difference.

Change-Id: I079b1ea7b645ff9400a08bb8d5bd0be5f1224a82
Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1152093
Reviewed-by: Craig Stout <cstout@google.com>
Commit-Queue: Emircan Uysaler <emircan@google.com>
Reviewed-by: Josh Gargus <jjosh@google.com>
2 files changed
tree: b4f1ce57f8f80ad7068891172f0904db5d98ceb8
  1. boards/
  2. build/
  3. bundles/
  4. docs/
  5. examples/
  6. infra/
  7. products/
  8. scripts/
  9. sdk/
  10. src/
  11. third_party/
  12. tools/
  13. zircon/
  14. .clang-format
  15. .clang-tidy
  16. .editorconfig
  17. .git-blame-ignore-revs
  18. .gitattributes
  19. .gitignore
  20. .gitmodules
  21. .gn
  22. .ignore
  23. analysis_options.yaml
  24. AUTHORS
  25. BUILD.gn
  26. CODE_OF_CONDUCT.md
  27. CONTRIBUTING.md
  28. fuchsia.code-workspace
  29. LICENSE
  30. OWNERS
  31. PATENTS
  32. pyproject.toml
  33. pyrightconfig.json
  34. README.md
  35. rustfmt.toml
  36. shac.star
  37. shac.textproto
README.md

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